org.columba.ristretto.coder

Class Base64

java.lang.Object

org.columba.ristretto.coder.Base64

public class Base64
extends java.lang.Object

Implementation of base64 en- and decoding methods. Base64 coding is used to efficiently represent a ByteBuffer as an US-ASCII compatible String.
Note: The size of the coded input will increase by about 33%.
RFC(s): 2045

Author:

Timo Stich

Constructor Summary

Constructors

Constructor and Description
Base64()

Method Summary

Modifier and Type	Method and Description
static java.nio.ByteBuffer	decode(java.lang.CharSequence input) Takes a base64 encoded String and decodes it into a ByteBuffer.
static byte[]	decodeToArray(java.lang.CharSequence input) Takes a base64 encoded String and decodes it into a byte[].
static java.lang.StringBuffer	encode(java.nio.ByteBuffer buffer) Encodes a ByteBuffer in base64.
static java.lang.StringBuffer	encode(java.nio.ByteBuffer input, boolean wrap) Encodes a ByteBuffer in base64 code.
static java.lang.StringBuffer	encode(java.lang.String input) Takes a String that is encoded in US-ASCII and converts it to base64.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Base64

public Base64()

Method Detail

decode

public static java.nio.ByteBuffer decode(java.lang.CharSequence input)

Takes a base64 encoded String and decodes it into a ByteBuffer. If you need to have a byte array use decodeToArray.

Parameters:

input - a base64 String

Returns:

the decoded ByteBuffer

decodeToArray

public static byte[] decodeToArray(java.lang.CharSequence input)

Takes a base64 encoded String and decodes it into a byte[].

Parameters:

input -

Returns:

the base64 encoded input

encode

public static java.lang.StringBuffer encode(java.nio.ByteBuffer input,
                                            boolean wrap)

Encodes a ByteBuffer in base64 code. If wrap is true, the output will be wrapped after 76 characters.

Parameters:

input - the raw bytes

wrap - wraps the output after 76 characters if true

Returns:

the base64 representation of the input

encode

public static java.lang.StringBuffer encode(java.lang.String input)

Takes a String that is encoded in US-ASCII and converts it to base64.
Convenience method that uses encode(ByteBuffer) after getting the bytes from the string.

Parameters:

input - the us-ascii input string

Returns:

StringBuffer with the encoded input

encode

public static java.lang.StringBuffer encode(java.nio.ByteBuffer buffer)

Encodes a ByteBuffer in base64. Wraps the result String after 76 characters.

Parameters:

buffer -

Returns:

StringBuffer with the encoded input

See Also:

encode(ByteBuffer, boolean)